How to Increase Max Upload Size in Your WordPress Multisite (MU)
If you need to increase the maximum upload size for your WordPress Multisite (MU), you may do so by following the steps below:
Login to your WordPress Dashboard and click on My Sites >> Network Admin >> Settings.
Scroll down to the bottom to locate " Max Upload File Size " under Upload Settings section. The default value is 1500 KiloBytes which is 1.5 MegaByte. You may adjust this figure to a higher number according to your preference. In this example, I shall increase the number to 5 MB.
Once you're done, remember to press on the Save Changes button.
Login to your WordPress Dashboard and click on My Sites >> Network Admin >> Settings.
Scroll down to the bottom to locate " Max Upload File Size " under Upload Settings section. The default value is 1500 KiloBytes which is 1.5 MegaByte. You may adjust this figure to a higher number according to your preference. In this example, I shall increase the number to 5 MB.
Once you're done, remember to press on the Save Changes button.
Updated on: 17/01/2019
Thank you!